Sprue forming and table locking mechanism



April'll, 1933.

G. F. YAGER ET AL SPRUE FORMING AND TABLE LOCKING MECHANISM Original Filed Aug. 31, 1931 2 Sheets-Sheet 1 W 11, 1933. G. F. YAGER ET AL 1,903,616

SPRUE FORMING AND TABLE LOCKING MECHANISM Original Filed Aug. 51, 1931 2 Sheets-Sheet 2 Mom:

Patented Apr. 11, 1933 UNITED STATES PATENT oFFic GEORGE F. YAGER AND OLIVER J. HEATH, OF TOLEDO, OHIO, ASSIGNORS TO THE BUNTING- BRASS & BRONZE COMPANY, OF TOLEDO, OHIO, A CORPORATION OF OHIO SPRUE FORMING AND TABLE LOCKING MECHANISM Original application filed August 31, 1931, Serial No. 560,455. Divided and this application filed May 31, 1932. Serial No. 614,578.

This. invention relates generally to sprue forming and table locking mechanism and constitutes a division of our application filed August 31, 1931 and bearing Serial Number 560,455.

In the accompanying drawings:

Figure 1 is a top plan view of a mold forming machine embodying our invention.

Figure 2 is a side elevation of a portion of the structure illustrated in Figure 1, and showing parts broken away and in section.

Figure 3 is a side elevation of the mold forming mechanism and showing parts broken away and in section.

Referring now to the drawings, A is a mold formingcmachine having a vertically movable squeeze plate 1, and B is a conveyor or turntable adjacent the machine A and having a rotatable dial 2 for conducting pattern plates such as 3 and flasks such as 4 beneath the squeeze plate 1 of the mold forming machine. As shown, the squeeze plate 1 is secured to the lower end of a shaft 5 reciprocably mounted in an arm 6 projecting laterally from a standard 7 rising from a suitable base 8. Preferably the standard 7 is provided above the base 8 in vertical alignment with the plate 1 with a shelf or platform 9 over which the'dial 2 is movable. (See Figure 3.) Pivotally connected to the upper end of the shaft 5 is a rocker 10 which is mounted on the-standard 7 and is connected to the upper end of a rod 11 reciprocable in a cylinder 12 pivoted to a lateral extension 13 of therstandard. 14 is a piston fixed to and actuable by the rod 11 in the cylinder, and 15 and 16 respectively are ports in the cylinder connected by suitable tubing 17 and 18 respectively to a double acting valve 19.

Preferably the dial 2 of the turntable is mounted on the upper end of a pedestal 20 and rests upon rollers 21 carried by the radially extending arms 22 of the pedestal. Mounted in superposed relation upon the dial 2 over openings 23 at spaced points thereof are risers 24 and pattern plates 25 having openings 26 and 27 respectively therein in vertical alignment with the openings 23.

Reciprocable in an opening 28 in the platform is a plunger 29 that is engageable with the openings '23 in the dial to hold the latter against rotation and that is engageable with the openings 27 in the pattern plates for forming the sprues in the flasks. As shown, the plunger 29 is connected by a collar 30 to a piston rod 31 reciprocating in a cylinder 32 below the platform. 33 is a piston fixed to the rod 31, and 34 and 35 respectively are ports connected by suitable tubing 36 and 37 respectively to a double acting valve 38.

In use a flask such as 4 may be placed on a pattern plate such at 25 at station a. The dial 2 may then be rotated to position this flask at station 6, where it may be filled with v sand. The dial 2 may then be again rotated to position the filled flask at station 0. At this point the valve 38 may be actuated so that fluid under pressure operating on the piston 33 will cause the plunger 29 to be moved upwardly and through the aligned openings 23, 26 and 27 respectively, thus looking the dial against rotation and forming the sprue in the sand within the flask. The

valve 19 may then be actuated to permit a fluid under pressure in the cylinder 12 to actuate the piston 14; and cause the squeeze plate 1 to compress the sand within the flask. When the sand has been compressed to the predetermined desired degree the valve 19 may be actuated to permit the fluid under pressure in the cylinder 12 to actuate the piston 14: in-the opposite direction so that the squeeze plate 1 may be raised. Likewise valve 38 may beactuated to permit the fluid under pressure in the cylinder 32 to actuate the piston 33 in the opposite direction and cause the plunger 29 to be withdrawn from the aligned openings 23, 26 and 27 respectively.

While it is believed that from the foregoing description the nature and advantages of the invention will be readily apparent, I desire to have it understood that I do not limit myself to what is herein shown and described and that such changes may be resorted to when desired as fall within the sco of what is claimed.

hat we claim as our invention is:

1. In a machine of the character described, a mold forming machine including a platform, a dial movable over the platform and adapted to carry a flask, and means associated with the platform for forming a sprue in the flask and for holding the dial from movement relative to the platform.

2. In a machine of the character described, a mold forming machine including a platform, a dial movable over the platform and adapted to carry a flask, and a reciprocating element movable through the platform for forming a sprue in the flask and for holding the dial against movement relative to the platform.

3. In a machine of the character described, a mold forming machine including a platform, a dial movable over the platform and adapted to carry a flask, and a common means associated with the platform for forming a sprue in the flask and for holding the dial against movement relative to the platform.

4. In a machine of the character described, a mold forming machine including a platform having an opening therein, a dial movable over the platform and having an opening registerable with the opening in the plat-- form, and means for holding the dial in a predetermined position relative to the platform including a member movable through said aligned openings.

5. In a machine of the character described, a conveyor for receiving a flask and for moving the same to a plurality of stations, a sprue forming member, and means for projecting said sprue forming member into said flask when the flask is positioned in one of said stations to form a sprue and to lock the conveyor against movement.

6. In a machine of the character described, a sprue forming member, a rotatable table adapted to receive a flask and adapted upon rotation to move the flask to an operative po sition with respect to said sprue forming member, said rotatable table beingprovided with an opening, and means for moving the sprue forming member to project the same through the opening in said table and into said flask to form a sprue and to lock the table against rotation. I

7. In a machine of the character described, a rotatable table, a flask support on said table, said table being provided with an opening adjacent said flask support, a sprue forming member, and means for projecting the sprue forming member through the opening in said table and into a flask supported by the table to form a sprue within the flask and to lock the table against rotation.

8. In a machine of the characterdescribed. a mold forming mechanism including a p'lat form and a sprue forming member mounted below said platform and arranged to be projected upwardly therethrough, a rotatable table arranged to overlie said platform and adapted to receive a flask and upon rotation to move the flask to a position over said platform, said rotatable table being provided with an opening, and means for proj ecting the sprue forming member upwardly through the platform and through the opening in the rotatable table to lock the table against rotation and to form a sprue within the flask on the table.

9. In a machine of the character described, a mold forming mechanism including a base provided with a laterally extending platform, a plunger mounted in said base for vertical reciprocation through said platform, means including a fluid pressure actuated piston for reciprocating said plunger, and a rotatable table having a flask support and having an opening adjacent said flask support, said rotatable table being so positioned relative to said base that upon rotation of said table the opening therein is brought into alignment with the plunger whereby the plunger may be projected upwardly through the opening in the table to lock the table against rotation and to form a sprue within a flask supported on the table.

In testimony whereof we affix our signatures.

GEORGE E. YAGER. OLIVER J. HEATH. 

